Much more detailed stuff:
Spoiler (highlight to view)
In later volumes it talked about his past where he used to live in a mansion with his parents. Later a mob dragged his parents out and killed them. He later meets a human who accepts him and they both have love interests. The women gets kidnapped and when they try to save them, his friend's head get shot with an arrow and his love interest gets executed. Having somehow survived the arrow shot to the head, he imprisons the vampire with his newfound powers for not saving his love.
That is all I can remember of the manga. Some of the details may be slightly wrong though. Any help is appreciated. Thanks.
